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Cool goIITian

Joined:	9 Nov 2009
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20 Nov 2009 23:11:07 IST

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give examples where a)the vel.of a particle is zero but its acceleration is not zero b)the vel. is

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give examples where a)the vel.of a particle is zero but its acceleration is not zero b)the vel. is opposite in the direction to the acceleration c)the vel. is perpendicular to the acceleration.

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harsh

Scorching goIITian

Joined: 3 May 2008

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21 Nov 2009 06:46:30 IST

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a)-at the highest point when u throw a ball up in the air...b) similiarly wen u throw a ball up in the air while going up..c) in a uniform circular motion vel is always perpendicular to the accln....

edison

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21 Nov 2009 10:20:47 IST

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Case when velocity is zero but acceleration is non zero

1) When a particle is thrown vertically upwasrds then at the topmost point v = 0, but a = g i.e. non zero

2) In case of SHM say simple pendulum the bob at extreme positions has velocity v = 0, but acceleration a = -(k/m) x and is non zero

edison

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21 Nov 2009 10:23:24 IST

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Case when velocity is opposite in the direction to the acceleration.

1) Particle thrown upwards, then during upward motion, velocity is opposite to the direction of acc i.e. g which is downwards

2) In case of SHM when particle is moving away from the center then direction of accn is always towards the center or equilibrium but velocity is opposite in direction

edison

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21 Nov 2009 10:24:51 IST

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The vel. is perpendicular to the acceleration ------ In Circular motion has tangential velocity perperndicular to the centripetal acceleration

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